Finding the Third Proportional to 108,724 and 172,968

Step by Step Solution

1. Step 1: Write the proportion equation
   108,724 : 172,968 = 172,968 : x
2. Step 2: Convert to fraction form
   108,724/172,968 = 172,968/x
3. Step 3: Cross multiply
   108,724x = 172,968 × 172,968
4. Step 4: Simplify right side
   108,724x = 29,917,929,024
5. Step 5: Solve for x
   x = 29,917,929,024/108,724
6. Step 6: Final answer
   x = 275,173.18